49ers Delanie Walker, (46) talks with head coach Jim Harbaugh late in the fourth quarter, as the San Francisco 49ers beat the Atlanta Falcons 28-24 to win the NFC Championship game on Sunday Jan. 20, 2013, at the Georgia Dome in Atlanta Ga.

Alice and Bryan Young, the aunt and uncle of 49ers tight end Delanie Walker, were killed in a car accident by a suspected drunken driver early Monday morning outside New Orleans after attending the Super Bowl.

Walker shared the news Wednesday morning on his Twitter and Instagram accounts: "Alice and bryan young my aunt and uncle was killed on Monday at 5 am after the super bowl by a drunk driver... We lost some good people they will be missed i love y'all so much."

According to the New Orleans Times-Picayune, the Youngs were inside their car on the shoulder of Interstate 10 around 5:30 a.m. when Nechole Thomas, 26, plowed into the back of their 2012 Nissan Altima at a "high rate of speed." Thomas, from Houston, was arrested on two counts of vehicular homicide, DWI and reckless operation of a vehicle after the accident in St. Charles Parish.

Both cars caught fire. Thomas, who sustained minor injuries, was able to exit her vehicle.

Walker's agent, Vincent Taylor, said Alice Young, 42, and Bryan Young, 54, were driving back to their hotel in or around Baton Rouge, about 85 miles from New Orleans. They spent time with Walker and other family members after the Super Bowl.

On his Instagram account, Walker posted two pictures of his aunt and uncle during the week of the Super Bowl. In one picture, the Youngs are with Walker after practice Saturday at the Superdome.

"We extend our deepest sympathies and prayers to Delanie and his family as they grieve this tragedy," 49ers general manager Trent Baalke said in a statement. "Our organization is here to support Delanie through this tough time, as we do with all of our players and staff. At this time, we will respect their family's privacy and ask others to do so as well."